# HG changeset patch
# User Gregory Szorc <gregory.szorc@gmail.com>
# Date 1537201528 25200
# Node ID c4b891fe44c3a4b487b2b2c92b8aada57c4c79aa
# Parent  870c31f85c902fa07a257244dab5f23d8ebaa00f
obsdiscovery: adopt to calling convention change

Upstream commits 71d83b315778 and abce899c985f changed the calling
convention of setdiscovery._takefullsample().

We inspect the signature of the function before calling it so
we can pass the proper arguments.

diff -r 870c31f85c90 -r c4b891fe44c3 hgext3rd/evolve/obsdiscovery.py
--- a/hgext3rd/evolve/obsdiscovery.py	Fri Sep 14 12:18:22 2018 +0200
+++ b/hgext3rd/evolve/obsdiscovery.py	Mon Sep 17 09:25:28 2018 -0700
@@ -24,6 +24,7 @@
 
 import hashlib
 import heapq
+import inspect
 import sqlite3
 import struct
 import weakref
@@ -110,7 +111,13 @@
         if len(undecided) < fullsamplesize:
             sample = set(undecided)
         else:
-            sample = _takefullsample(dag, undecided, size=fullsamplesize)
+            # Mercurial 4.8 changed calling convention.
+            if len(inspect.getargspec(_takefullsample)[0]) == 4:
+                sample = _takefullsample(local, None, undecided,
+                                         size=fullsamplesize)
+            else:
+                # hg <= 4.7 version
+                sample = _takefullsample(dag, undecided, size=fullsamplesize)
 
         roundtrips += 1
         ui.progress(_("comparing with other"), totalnb - len(undecided),